TIM3 signaling in effector T cells acts as an immunometabolic switch in the purine degradation pathway to suppress intestinal inflammation

The authors investigate the role of the immune checkpoint receptor TIM3 in regulating effector T cell metabolism and function in inflammatory bowel diseases (IBD). They find that TIM3 signaling suppresses the purine degradation pathway and maintains T cells in an exhausted state, with insufficient TIM3 ligand availability contributing to chronic inflammation. Their results suggest that targeting TIM3 activation could be a promising therapeutic strategy for managing chronic intestinal inflammation.